Electrolyte for electric storage batteries



EDWABLD HACKIMG', 0F GENTRM: ream, EETGDE Ifillrllliil).

ELECTRQLYTE FGR ELECTRIC t STOEBAG'E BQTTERIEQ.

No Drawing. Original application filed December 17, 191%, serial lt'o.345, 2261! mutated and this application filed clune 8, 1320. SerialFilo. earner.

To all whom it may concern:

Be it known that I EDWARD HaoKINe, a citizen of the United tates,residing at Central Falls, in the county of Providence and State ofRhode Island, have invented certain new and useful Improvements inElectrolytes fonElectric Storage Batteries of which the following is aspecification.

My invention relates particularly to an electrolyte for secondary orstorage batteries of the standard type in which lead plates and sulfuricacid are employed. This ap plication constitutes a division of my pend-'ing United States patent application 'Ser.

No. 345,461 filed December 17, 1919.

The essential objects of my invention are to prevent the shedding of theactive material of the plates; to facilitate the circulation of theacid; to insure solidity and to maintain the plates firmly and rigidly;to eliminate washing from. the plates the valuable oxid depositsthereon; to insure close adhesion of the electrolyte to the plates; andto provide an electrolyte capable of being introduced into the cell as aliquid and there upon assume a solid condition without physicalassistance, and to produce an electrolyte of a solid character whichnotwithstanding its solid character furnishes a gravity reading.

My invention consists in such compositions of matter as form the subjectof the up ended claims.

he preferred method of carrying out my invention is as follows.

ll prepare a solution formed by mixing water and silicate of soda in theproportion of four ounces of'water to two ounces of silicate of soda.

tion of ingredients is thirty two ounces of water to three ounces ofborax.

Next a mixtureofthe followin in r'edi-- ents is made, namely, sixteenounces of pow- Specification of Letters Eatent. Pa'lggflfigdl-Deg 141.1%263 dered pumice; four ounces of the first solution, and two ounces ofthe second solution.

Thisconstitutes a thick creamy mixture which, in the required quantityis poured into the battery cell until it covers the plates. The quantityis obviously determined by the capacity of the particular cell. Afterabout an hour after its introduction into the cell the material setsinto a solid porous mass or electrolyte. The consistency of thismaterial is such as to prevent shedding of the plates.

In use at any time it is possibleto introduce a small quantity of waterinto the battery upon the top of the electrolyte and then get a gravityreading of the strength of the charge in the battery.

I claim:

1. An electrolyte for electric storage batteries which consists of amass oi. pumice combined with sulfuric acid.

2. An electrolyte for electric storage batteries consisting of ahardened mass of pumice and borax.

3. An electrolyte for electric stora e batteries comprising a hardenedmass 0 pumice, borax and sulfuric acid.

in testimony whereof l have aifiazcd my signature.

EDWARD

